Nicholas G. Vlahakis

ION Geophysical Corp. engages in the provision of geoscience technology, services, and solutions to the oil and gas industry. It operates through the E&P Technology and Services, and Operations Optimization segments. The E&P Technology and Services segment creates digital data assets and delivers services that improve decision-making, mitigate risk and maximize portfolio value for E&P companies. The Operations Optimization segment develops mission-critical subscription offerings and engineering services that enable operational control and optimization offshore. The company was founded in 1968 and is headquartered in Houston, TX.

Part of Northrop Grumman Corp., Hercules Aerospace Co. is a manufacturer of rocket motors for missiles. The company is based in Magna, UT. Hercules Aerospace was acquired by Alliant Techsystems, Inc. from Hercules, Inc. on March 16, 1995 for $408.91 million.

Alliant Techsystems, Inc. designs and manufactures aerospace, defense, and commercial products. It operates its business through three segments: Aerospace Group, Defense Group, and Sporting Group. The Aerospace Group develops and produces rocket motor systems for human and cargo launch vehicles, conventional and strategic missiles, missile defense interceptors, small and micro-satellites, satellite components, structures and subsystems, lightweight space deployables and solar arrays, and provides engineering and technical services. It also operates in the military and commercial aircraft and launch structures markets. The Defense Group develops and produces military small, medium and large caliber ammunition, propulsion systems for tactical missiles and missile defense applications, strike weapons, precision munitions, gun systems, aircraft survivability systems, fuzes and warheads, energetic materials and special mission aircraft. The Sporting Group develops and produces commercial ammunition, accessories, rifles and shotguns for the hunting, shooting, law enforcement, outdoor and sporting markets. The company was founded on May 2, 1990 and is headquartered in Arlington, VA.